i really don't see how it's possible unless internal mods were done....

here is the input schematic to a 7747: http://www.exatorq.com/ludis_obd1/1228746sheet3.gif

notice the analog inputs:

diagnostc circuit(ALLD pin B)
MAT
CTS
TPS
MAP
ignition voltage
pump voltage
O2

now, check the actual A/D chip here: http://www.exatorq.com/ludis_obd1/1228746sheet2.gif

bottom right corner, you'll see a couple of analog channels that are tied to ground. you would either need to reconfigure those channels and modify the algorithm to read those channels and put them in the datastream or replace one of the existing A/D inputs with the wideband signal, and even then, that can require internal mods as well.